runZoned<R> method Null safety

R runZoned<R>(
  1. R body(
      ),
    1. {Directory createDirectory(
      1. String
      )?,
    2. Directory getCurrentDirectory(
        )?,
      1. void setCurrentDirectory(
        1. String
        )?,
      2. Directory getSystemTempDirectory(
          )?,
        1. File createFile(
          1. String
          )?,
        2. Future<FileStat> stat(
          1. String
          )?,
        3. FileStat statSync(
          1. String
          )?,
        4. Future<bool> fseIdentical(
          1. String,
          2. String
          )?,
        5. bool fseIdenticalSync(
          1. String,
          2. String
          )?,
        6. Future<FileSystemEntityType> fseGetType(
          1. String,
          2. bool
          )?,
        7. FileSystemEntityType fseGetTypeSync(
          1. String,
          2. bool
          )?,
        8. Stream<FileSystemEvent> fsWatch(
          1. String,
          2. int,
          3. bool
          )?,
        9. bool fsWatchIsSupported(
            )?,
          1. Link createLink(
            1. String
            )?,
          2. Future<Socket> socketConnect(
            1. dynamic,
            2. int,
            3. {dynamic sourceAddress,
            4. Duration? timeout}
            )?,
          3. Future<ConnectionTask<Socket>> socketStartConnect(
            1. dynamic,
            2. int,
            3. {dynamic sourceAddress}
            )?,
          4. Future<ServerSocket> serverSocketBind(
            1. dynamic,
            2. int,
            3. {int backlog,
            4. bool shared,
            5. bool v6Only}
            )?}
          )

          Runs body in a fresh Zone using the provided overrides.

          See the documentation on the corresponding methods of IOOverrides for information about what the optional arguments do.

          Implementation

          static R runZoned<R>(R body(),
    {
    // Directory
    Directory Function(String)? createDirectory,
    Directory Function()? getCurrentDirectory,
    void Function(String)? setCurrentDirectory,
    Directory Function()? getSystemTempDirectory,

    // File
    File Function(String)? createFile,

    // FileStat
    Future<FileStat> Function(String)? stat,
    FileStat Function(String)? statSync,

    // FileSystemEntity
    Future<bool> Function(String, String)? fseIdentical,
    bool Function(String, String)? fseIdenticalSync,
    Future<FileSystemEntityType> Function(String, bool)? fseGetType,
    FileSystemEntityType Function(String, bool)? fseGetTypeSync,

    // _FileSystemWatcher
    Stream<FileSystemEvent> Function(String, int, bool)? fsWatch,
    bool Function()? fsWatchIsSupported,

    // Link
    Link Function(String)? createLink,

    // Socket
    Future<Socket> Function(dynamic, int,
            {dynamic sourceAddress, Duration? timeout})?
        socketConnect,
    Future<ConnectionTask<Socket>> Function(dynamic, int,
            {dynamic sourceAddress})?
        socketStartConnect,

    // ServerSocket
    Future<ServerSocket> Function(dynamic, int,
            {int backlog, bool v6Only, bool shared})?
        serverSocketBind}) {
  IOOverrides overrides = new _IOOverridesScope(
    // Directory
    createDirectory,
    getCurrentDirectory,
    setCurrentDirectory,
    getSystemTempDirectory,

    // File
    createFile,

    // FileStat
    stat,
    statSync,

    // FileSystemEntity
    fseIdentical,
    fseIdenticalSync,
    fseGetType,
    fseGetTypeSync,

    // _FileSystemWatcher
    fsWatch,
    fsWatchIsSupported,

    // Link
    createLink,

    // Socket
    socketConnect,
    socketStartConnect,

    // ServerSocket
    serverSocketBind,
  );
  return _asyncRunZoned<R>(body, zoneValues: {_ioOverridesToken: overrides});
}